Trr No. 1171 Asphalt Materials And Mixtures, pp. 12-17
The modifiedx version is a practical substitute for its former version that was based on longer immersion periods (up to 14 days) and a greater number of sample sets (five versus three neede by the current procedure). The development of the test was supported by laboratory and initial field experience, as well as by theoretical considerations of the behaviour of mixtures during long immersion periods. Suggestions for needed further research are outlined at the end of the paper